A.when at anchor
B.only when making way
C.at any time when underway
D.only when the identifying lights are not being shown
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A.underway，but not making way
B.aground
C.being towed
D.not engaged in pilotage duty
A.should never use radar bearings
B.should only use radar bearings when the range exceeds the distance to the horizon
C.can use radar information from one object to fix the position
D.must use information from targets forward of the beam
A.straight line
B.arc
C.parabola
D.line parallel to the coast
A.one sidelight and the masthead light are visible
B.the vessels will pass closer than half a mile
C.both vessels sound one prolonged blast
D.both sidelights and masthead light(s) are visible
A.required navigation lights
B.lifesaving equipment standards
C.casualty reporting procedures
D.currents in various locations
最新試題
Conditions for crossing a rough bar are usually best at （）.
In Admiralty Sailing Directions，bands is the word used to indicate（）marking．
The distance from the still water level (corrected for tides and storm surge) to the bottom of the hull of a ship is the（）.
The Earth has the shape of a(n) （）.
The Earth’s irregular heating is caused by （）.
A pilot vessel on pilotage duty at night will show sidelights and a sternlight （）.
On a voyage from Capetown to London，the favorable ocean current off the coast of Africa is the （）.
The period at high or low tide during which there is no change in the height of the water is called the （）.
Lateral movement of the vessel to leeward of its course defines （）.
Clearance gauges at bridges indicate （）.